While not a desktop app, you can enable offline mode in Google Drive and work without internet. Spanish language fully supported.
If you need an office suite without a traditional installation or high cost, consider these officially supported options: Microsoft 365 Online : Microsoft offers a free web-based version microsoft office 2013 portable espa%C3%B1ol 1 link mega nz
Puedes ejecutarlo directamente desde una memoria USB en cualquier computadora con Windows. While not a desktop app, you can enable
Portable versions rarely receive critical security patches or performance updates, leaving your system exposed to known vulnerabilities. While not a desktop app